1
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Small structural alterations greatly influence the membrane affinity of lipophilic ligands: Membrane interactions of bafilomycin A1 and its desmethyl derivative bearing 19F-labeling. Bioorg Med Chem 2019; 27:1677-1682. [DOI: 10.1016/j.bmc.2019.03.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 11/20/2022]
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2
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Guo JJ, Yang DP, Tian X, Vemuri VK, Yin D, Li C, Duclos RI, Shen L, Ma X, Janero DR, Makriyannis A. 17β-estradiol (E2) in membranes: Orientation and dynamic properties. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1858:344-53. [PMID: 26607010 DOI: 10.1016/j.bbamem.2015.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 11/16/2015] [Accepted: 11/18/2015] [Indexed: 11/27/2022]
Abstract
Non-genomic membrane effects of estrogens are of great interest because of the diverse biological activities they may elicit. To further our understanding of the molecular features of the interaction between estrogenic hormones and membrane bilayers, we have determined the preferred orientation, location, and dynamic properties of 17β-estradiol (E2) in two different phospholipid membrane environments using (2)H-NMR and 2D (1)H-(13)C HSQC in conjunction with molecular dynamics simulations. Unequivocal spectral assignments to specific (2)H labels were made possible by synthesizing six selectively deuterated E2 molecules. The data allow us to conclude that the E2 molecule adopts a nearly "horizontal" orientation in the membrane bilayer with its long axis essentially perpendicular to the lipid acyl-chains. All four rings of the E2 molecule are located near the membrane interface, allowing both the E2 3-OH and the 17β-OH groups to engage in hydrogen bonding and electrostatic interactions with polar phospholipid groups. The findings augment our knowledge of the molecular interactions between E2 and membrane bilayer and highlight the asymmetric nature of the dynamic motions of the rigid E2 molecule in a membrane environment.
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Affiliation(s)
- Jason J Guo
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA.
| | - De-Ping Yang
- Physics Department, College of the Holy Cross, 1 College Street, Worcester, MA 01610, USA
| | - Xiaoyu Tian
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - V Kiran Vemuri
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - Dali Yin
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - Chen Li
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - Richard I Duclos
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - Lingling Shen
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - Xiaoyu Ma
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - David R Janero
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - Alexandros Makriyannis
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA; Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA.
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3
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Glanzer S, Pulido SA, Tutz S, Wagner GE, Kriechbaum M, Gubensäk N, Trifunovic J, Dorn M, Fabian WMF, Novak P, Reidl J, Zangger K. Structural and functional implications of the interaction between macrolide antibiotics and bile acids. Chemistry 2015; 21:4350-8. [PMID: 25655041 PMCID: PMC4471570 DOI: 10.1002/chem.201406413] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Indexed: 01/13/2023]
Abstract
Macrolide antibiotics, such as azithromycin and erythromycin, are in widespread use for the treatment of bacterial infections. Macrolides are taken up and excreted mainly by bile. Additionally, they have been implicated in biliary system diseases and to modify the excretion of other drugs through bile. Despite mounting evidence for the interplay between macrolide antibiotics and bile acids, the molecular details of this interaction remain unknown. Herein, we show by NMR measurements that macrolides directly bind to bile acid micelles. The topology of this interaction has been determined by solvent paramagnetic relaxation enhancements (solvent PREs). The macrolides were found to be bound close to the surface of the micelle. Increasing hydrophobicity of both the macrolide and the bile acid strengthen this interaction. Both bile acid and macrolide molecules show similar solvent PREs across their whole structures, indicating that there are no preferred orientations of them in the bile micelle aggregates. The binding to bile aggregates does not impede macrolide antibiotics from targeting bacteria. In fact, the toxicity of azithromycin towards enterotoxic E. coli (ETEC) is even slightly increased in the presence of bile, as was shown by effective concentration (EC50 ) values.
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Affiliation(s)
| | | | - Sarah Tutz
- Institute of Molecular BiosciencesUniversity of Graz (Austria)
| | | | | | | | - Jovana Trifunovic
- Dept. of Pharmacology, Medical FacultyUniversity of Novi Sad (Serbia)
| | - Markus Dorn
- Institute of NavigationGraz University of Technology (Austria)
| | | | - Predrag Novak
- Department of Chemistry, Faculty of Natural ScienceUniversity of Zagreb (Croatia)
| | - Joachim Reidl
- Institute of Molecular BiosciencesUniversity of Graz (Austria)
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4
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Mosedale M, Wu H, Kurtz CL, Schmidt SP, Adkins K, Harrill AH. Dysregulation of protein degradation pathways may mediate the liver injury and phospholipidosis associated with a cationic amphiphilic antibiotic drug. Toxicol Appl Pharmacol 2014; 280:21-9. [PMID: 24967691 DOI: 10.1016/j.taap.2014.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 06/13/2014] [Accepted: 06/15/2014] [Indexed: 01/15/2023]
Abstract
A large number of antibiotics are known to cause drug-induced liver injury in the clinic; however, interpreting clinical risk is not straightforward owing to a lack of predictivity of the toxicity by standard preclinical species and a poor understanding of the mechanisms of toxicity. An example is PF-04287881, a novel ketolide antibiotic that caused elevations in liver function tests in Phase I clinical studies. In this study, a mouse diversity panel (MDP), comprised of 34 genetically diverse, inbred mouse strains, was utilized to model the toxicity observed with PF-04287881 treatment and investigate potential mechanisms that may mediate the liver response. Significant elevations in serum alanine aminotransferase (ALT) levels in PF-04287881-treated animals relative to vehicle-treated controls were observed in the majority (88%) of strains tested following a seven day exposure. The average fold elevation in ALT varied by genetic background and correlated with microscopic findings of hepatocellular hypertrophy, hepatocellular single cell necrosis, and Kupffer cell vacuolation (confirmed as phospholipidosis) in the liver. Global liver mRNA expression was evaluated in a subset of four strains to identify transcript and pathway differences that distinguish susceptible mice from resistant mice in the context of PF-04287881 treatment. The protein ubiquitination pathway was highly enriched among genes associated with PF-04287881-induced hepatocellular necrosis. Expression changes associated with PF-04287881-induced phospholipidosis included genes involved in drug transport, phospholipid metabolism, and lysosomal function. The findings suggest that perturbations in genes involved in protein degradation leading to accumulation of oxidized proteins may mediate the liver injury induced by this drug.
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Affiliation(s)
- Merrie Mosedale
- Hamner-University of North Carolina Institute for Drug Safety Sciences, The Hamner Institutes for Health Sciences, Research Triangle Park, NC 27709, USA
| | - Hong Wu
- Drug Safety Research and Development, Pfizer Global Research and Development, Groton, CT06340, USA
| | - C Lisa Kurtz
- Hamner-University of North Carolina Institute for Drug Safety Sciences, The Hamner Institutes for Health Sciences, Research Triangle Park, NC 27709, USA
| | - Stephen P Schmidt
- Drug Safety Research and Development, Pfizer Global Research and Development, Groton, CT06340, USA
| | - Karissa Adkins
- Drug Safety Research and Development, Pfizer Global Research and Development, Groton, CT06340, USA.
| | - Alison H Harrill
- Hamner-University of North Carolina Institute for Drug Safety Sciences, The Hamner Institutes for Health Sciences, Research Triangle Park, NC 27709, USA; University of Arkansas for Medical Sciences, Little Rock, AR72205, USA
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5
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Ye W, Lind J, Eriksson J, Mäler L. Characterization of the morphology of fast-tumbling bicelles with varying composition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5488-5496. [PMID: 24785902 DOI: 10.1021/la500231z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Small, fast-tumbling bicelles are frequently used in solution NMR studies of protein-lipid interactions. For this purpose it is critical to have information about the organization of the lipids within the bicelle structure. We have studied the morphology of small, fast-tumbling bicelles containing DMPC and DHPC as a function of temperature, lipid concentration, and the relative ratio (q value) of lipid (DMPC) to detergent (DHPC) amounts. Dynamic light scattering and cryo-transmission electron microscopy techniques were used to measure the size of the bicelles and to monitor the shape and dispersity of the particles in the samples. The stability and size of DMPC-containing bicelle mixtures were found to be highly dependent on temperature and the total lipid concentration for mixtures with q = 1 and q = 1.5. Stable DMPC/DHPC bicelles are only formed at low q values (0.5). Bicelle mixtures with q > 0.5 appear to be multidisperse containing more than one component, one with r(H) around 2.5 nm and one with r(H) of 6-8 nm. This is interpreted as a coexistence of small (possibly mixed micelles) bicelles and much larger bicelles. Incubating the sample at 37 °C increases the phase separation. Moreover, low total amphiphile concentrations and low q values lead to the formation of a temperature-independent morphology, interpreted as the formation of small particles in which the DHPC and DMPC are more mixed. On the basis of these results, we propose the existence of a critical bicelle concentration, a parameter that determines the existence of bilayered bicelles, which varies with q value. This polymorphism was not observed at any concentrations for q = 0.5 bicelles, for which a small but detectable temperature dependence was observed at high concentrations. The results demonstrate that q = 0.5 mixtures predominantly form "classical" bicelles, but that caution is needed when using fast-tumbling mixtures with q values higher than 0.5.
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Affiliation(s)
- Weihua Ye
- Department of Biochemistry and Biophysics, Center for Biomembrane Research, The Arrhenius Laboratory, Stockholm University , SE-10691 Stockholm, Sweden
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6
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Matsumori N. Structure and Interaction in Lipid Bilayers Analyzed Using Bicelles. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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7
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Dürr UH, Soong R, Ramamoorthy A. When detergent meets bilayer: birth and coming of age of lipid bicelles. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2013; 69:1-22. [PMID: 23465641 PMCID: PMC3741677 DOI: 10.1016/j.pnmrs.2013.01.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 08/30/2012] [Indexed: 05/12/2023]
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8
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Kosol S, Schrank E, Krajačić MB, Wagner GE, Meyer NH, Göbl C, Rechberger GN, Zangger K, Novak P. Probing the Interactions of Macrolide Antibiotics with Membrane-Mimetics by NMR Spectroscopy. J Med Chem 2012; 55:5632-6. [DOI: 10.1021/jm300647f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Simone Kosol
- Institute
of Chemistry/Organic
and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28,
A-8010 Graz, Austria
| | - Evelyne Schrank
- Institute
of Chemistry/Organic
and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28,
A-8010 Graz, Austria
| | | | - Gabriel E. Wagner
- Institute
of Chemistry/Organic
and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28,
A-8010 Graz, Austria
| | - N. Helge Meyer
- Institute
of Chemistry/Organic
and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28,
A-8010 Graz, Austria
| | - Christoph Göbl
- Institute
of Chemistry/Organic
and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28,
A-8010 Graz, Austria
| | - Gerald N. Rechberger
- Institute of Molecular Biosciences,
University of Graz, Humboldtstrasse 50, A-8010 Graz, Austria
| | - Klaus Zangger
- Institute
of Chemistry/Organic
and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28,
A-8010 Graz, Austria
| | - Predrag Novak
- Department of Chemistry, Faculty
of Natural Science, University of Zagreb, Laboratory for Analytical
Chemistry, Horvatovac 102a, HR-10000 Zagreb, Croatia
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9
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Baek SB, Lim SC, Lee HJ, Lee HC, Kim C. An NMR Study on the Conformation of Substance P in Acidic Bicelles. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.10.3702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Matsumori N, Murata M. 3D structures of membrane-associated small molecules as determined in isotropic bicelles. Nat Prod Rep 2010; 27:1480-92. [DOI: 10.1039/c0np00002g] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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11
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Kim C, Baek SB, Kim DH, Lim SC, Lee HJ, Lee HC. Thermodynamics of partitioning of substance P in isotropic bicelles. J Pept Sci 2009; 15:353-8. [PMID: 19189270 DOI: 10.1002/psc.1121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The temperature dependence of the partition of a neuropeptide, substance P (SP), in isotropic (q = 0.5) bicelles was investigated by using pulsed field gradient NMR diffusion technique. The partition coefficient decreases as the temperature is increased from 295 to 325 K, indicating a favorable (negative) enthalpy change upon partitioning of the peptide. Thermodynamic analysis of the data shows that the partitioning of SP at 300 K is driven by the enthalpic term (DeltaH) with the value of - 4.03 kcal mol(-1), while it is opposed by the entropic term (-TDeltaS) by approximately 1.28 kcal mol(-1) with a small negative change in heat capacity (DeltaC(p)). The enthalpy-driven process for the partition of SP in bicelles is the same as in dodecylphosphocholine (DPC) micelles, however, the negative entropy change in bicelles of flat bilayer surface is in sharp contrast with the positive entropy change in DPC micelles of highly curved surface, indicating that the curvature of the membrane surface might play a significant role in the partitioning of peptides.
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Affiliation(s)
- Chul Kim
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
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12
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Ribeiro CMP, Hurd H, Wu Y, Martino MEB, Jones L, Brighton B, Boucher RC, O'Neal WK. Azithromycin treatment alters gene expression in inflammatory, lipid metabolism, and cell cycle pathways in well-differentiated human airway epithelia. PLoS One 2009; 4:e5806. [PMID: 19503797 PMCID: PMC2688381 DOI: 10.1371/journal.pone.0005806] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Accepted: 05/02/2009] [Indexed: 02/07/2023] Open
Abstract
Prolonged macrolide antibiotic therapy at low doses improves clinical outcome in patients affected with diffuse panbronchiolitis and cystic fibrosis. Consensus is building that the therapeutic effects are due to anti-inflammatory, rather than anti-microbial activities, but the mode of action is likely complex. To gain insights into how the macrolide azithromycin (AZT) modulates inflammatory responses in airways, well-differentiated primary cultures of human airway epithelia were exposed to AZT alone, an inflammatory stimulus consisting of soluble factors from cystic fibrosis airways, or AZT followed by the inflammatory stimulus. RNA microarrays were conducted to identify global and specific gene expression changes. Analysis of gene expression changes revealed that the AZT treatment alone altered the gene profile of the cells, primarily by significantly increasing the expression of lipid/cholesterol genes and decreasing the expression of cell cycle/mitosis genes. The increase in cholesterol biosynthetic genes was confirmed by increased filipin staining, an index of free cholesterol, after AZT treatment. AZT also affected genes with inflammatory annotations, but the effect was variable (both up- and down-regulation) and gene specific. AZT pretreatment prevented the up-regulation of some genes, such as MUC5AC and MMP9, triggered by the inflammatory stimulus, but the up-regulation of other inflammatory genes, e.g., cytokines and chemokines, such as interleukin-8, was not affected. On the other hand, HLA genes were increased by AZT. Notably, secreted IL-8 protein levels did not reflect mRNA levels, and were, in fact, higher after AZT pretreatment in cultures exposed to the inflammatory stimulus, suggesting that AZT can affect inflammatory pathways other than by altering gene expression. These findings suggest that the specific effects of AZT on inflamed and non-inflamed airway epithelia are likely relevant to its clinical activity, and their apparent complexity may help explain the diverse immunomodulatory roles of macrolides.
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Affiliation(s)
- Carla Maria P Ribeiro
- Cystic Fibrosis Center, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America.
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13
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Guo J, Yang DP, Chari R, Tian X, Pavlopoulos S, Lu D, Makriyannis A. Magnetically aligned bicelles to study the orientation of lipophilic ligands in membrane bilayers. J Med Chem 2008; 51:6793-9. [PMID: 18834109 DOI: 10.1021/jm800766x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Magnetically aligned bicelles were used as a model membrane to study the orientation and dynamic properties of two cannabinoids (Delta (8)-THC and Me-Delta (8)-THC) using (31)P and (2)H NMR. The uniform alignment of the bicelles allowed us to obtain well resolved deuterium spectra from a solution NMR spectrometer. The preferred orientations of Delta (8)-THC and Me-Delta (8)-THC were calculated on the basis of the measurements of individual quadrupolar splittings. Our results agree with previous experiments using multilamellar membranes as well as with molecular dynamics simulation data described here. In conjunction with our earlier report using small and fast tumbling bicelles, the present work of well aligned bicelles shows that bicelle preparations can provide either pseudoisotropic or anisotropic NMR spectra to study the conformation, orientation, and dynamic properties of ligands in membrane bilayers. Such data are of critical value for understanding the interactions of lipophilic drug molecules with membrane proteins.
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Affiliation(s)
- Jianxin Guo
- Center for Drug Discovery, 116 Mugar Life Sciences Building, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA
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14
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Houdai T, Matsumori N, Murata M. Structure of membrane-bound amphidinol 3 in isotropic small bicelles. Org Lett 2008; 10:4191-4. [PMID: 18767855 DOI: 10.1021/ol8016337] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Amphidinol 3 (AM3) exhibits a potent membrane permeabilizing activity by forming pores in biological membranes. We examined the conformation and location of AM3 using isotropic bicelles, a more natural membrane model than micelles. The results show that AM3 takes turn structures at the two tetrahydropyran rings. Most of the hydrophilic region of the molecule is predominantly present in the surface, while the hydrophobic polyolefin penetrates in the bicelle interior.
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Affiliation(s)
- Toshihiro Houdai
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Toyonaka, Osaka 560- 0043, Japan
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15
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Murata M, Matsumori N, Konoki K, Oishi T. Structural Features of Dinoflagellate Toxins Underlying Biological Activity as Viewed by NMR. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.307] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Vitovič P, Alakoskela JM, Kinnunen PKJ. Assessment of Drug−Lipid Complex Formation by a High-Throughput Langmuir-Balance and Correlation to Phospholipidosis. J Med Chem 2008; 51:1842-8. [DOI: 10.1021/jm7013953] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pavol Vitovič
- Helsinki Biophysics and Biomembrane Group, Institute of Biomedicine/Medical Biochemistry, P.O. Box. 63 (Haartmaninkatu 8), FIN-00014 University of Helsinki, Finland
| | - Juha-Matti Alakoskela
- Helsinki Biophysics and Biomembrane Group, Institute of Biomedicine/Medical Biochemistry, P.O. Box. 63 (Haartmaninkatu 8), FIN-00014 University of Helsinki, Finland
| | - Paavo K. J. Kinnunen
- Helsinki Biophysics and Biomembrane Group, Institute of Biomedicine/Medical Biochemistry, P.O. Box. 63 (Haartmaninkatu 8), FIN-00014 University of Helsinki, Finland
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17
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Uekusa Y, Kamihira M, Nakayama T. Dynamic behavior of tea catechins interacting with lipid membranes as determined by NMR spectroscopy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:9986-9992. [PMID: 17966973 DOI: 10.1021/jf0712402] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Interaction between tea catechins, such as epicatechin gallate (ECg) and epigallocatechin gallate (EGCg), and isotropic bicelle model lipid membranes was investigated by solution NMR techniques. (1)H NMR measurements provided signals from the B-ring and the galloyl moiety in ECg and EGCg that were obviously shifted, and whose proton T1 relaxation times were shortened upon interaction of the catechins with the bicelles. These results indicate that the B-ring and the galloyl moiety play an important role in this interaction. Nuclear Overhauser effect spectrometry experiments demonstrated that the B-ring and the galloyl moiety are located near the gamma-H in the phospholipid trimethylammonium group. On the basis of these findings, we propose that ECg and EGCg interact with the surface of lipid membranes via the choline moiety.
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Affiliation(s)
- Yoshinori Uekusa
- Laboratory of Functional Food Science and Global COE Program, School of Food and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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18
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Matsumori N, Morooka A, Murata M. Conformation and Location of Membrane-Bound Salinomycin−Sodium Complex Deduced from NMR in Isotropic Bicelles. J Am Chem Soc 2007; 129:14989-95. [DOI: 10.1021/ja075024l] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nobuaki Matsumori
- Contribution from the Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Atsushi Morooka
- Contribution from the Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Michio Murata
- Contribution from the Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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19
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Takajo Y, Matsuki H, Kaneshina S, Aratono M, Yamanaka M. Miscibility and interaction between 1-alkanol and short-chain phosphocholine in the adsorbed film and micelles. Colloids Surf B Biointerfaces 2007; 59:52-8. [PMID: 17560093 DOI: 10.1016/j.colsurfb.2007.04.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2007] [Revised: 04/09/2007] [Accepted: 04/12/2007] [Indexed: 10/23/2022]
Abstract
The miscibility and interaction of 1-hexanol (C6OH) and 1-heptanol (C7OH) with 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC) in the adsorbed films and micelles were investigated by measuring the surface tension of aqueous C6OH-DHPC and aqueous C7OH-DHPC solutions. The surface density, the mean molecular area, the composition of the adsorbed film, and the excess Gibbs energy of adsorption g(H,E), were estimated. Further, the critical micelle concentration of the mixtures was determined from the surface tension versus molality curves; the micellar composition was calculated. The miscibility of the 1-alkanols and DHPC molecules in the adsorbed film and micelles was examined using the phase diagram of adsorption (PDA) and that of micellization (PDM). The PDA and the composition dependence of g(H,E) indicated the non-ideal mixing of the 1-alkanols and DHPC molecules due to the attractive interaction between the molecules in the adsorbed film, while the PDM indicated that the 1-alkanol molecules were not incorporated in the micelles within DHPC rich region. The dependence of the mean molecular area of the mixtures on the surface composition suggested that the packing property of the adsorbed film depends on the chain length of 1-alkanol: C6OH expands the DHPC adsorbed film more than C7OH.
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Affiliation(s)
- Yuichi Takajo
- Department of Chemistry, Faculty of Sciences, Kyushu University, 4-2-1 Ropponmatsu, Chuo-Ku, 810-8560 Fukuoka, Japan
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